This retrograde sex comedy is embarrassing for just about everyone involved, but I do think a special endurance shout-out should go to Reid Ewing (“Modern Family”), both for the sheer amount of screen time his dim-bulb surfer spends naked and running around, and for being the only character I’ve ever seen accosted from behind with a canine tongue . . . and enjoying it.
That really is the highlight/lowlight of this painful film from director Leslie Grief, in which two monogamy-challenged Manhattan couples (Jesse Bradford and Virginia Williams; Chris Marquette and Tammin Sursok) decamp to the Hamptons on the weekend of a big party thrown by Michael McKean’s sassy rich guy (his autobiography is borderline-amusingly titled “I F–ked Everyone”). Throw in a party planner (Bryan Callen) pretending to be gay, a famous author (Wendi McLendon-Covey) with a ridiculously fake British accent and a spitfire Brazilian bombshell (Lucila Solá), and “10 Rules for Sleeping Around” has all the stereotype bases covered.